How Ecosystems Work

As energy passes from one organism to the next, through trophic levels, much of the energy is

not used by the organism for cellular processes. Much of the energy is lost

through___________________.

• photosynthesis

• cellular respiration

• heat

• cellular metabolism

Tags

NGSS.HS-LS1-7

Most organisms break down sugar to produce usable energy through the process of

• diffusion.

• chemosynthesis.

• photosynthesis.

• cellular respiration.

Tags

NGSS.MS-LS1-7

What is the difference between primary and secondary succession?

• There is already soil present with primary succession.

• There is already soil present with secondary succession.

• Primary succession does not take as long.

• There is no difference.

The process of cellular respiration

• occurs only in animals.

• breaks down food molecules to release stored energy.

• must occur before plants are able to carry out photosynthesis.

• is performed only by organisms that are incapable of photosynthesis.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS2-3

Which biogeochemical cycle does NOT involve a stage where the chemical enters the

atmosphere?

• the water cycle

• the carbon cycle

• the nitrogen cycle

• the phosphorous cycle

What are the reactants of cellular respiration?

• ATP and water

• sugar and oxygen

• NADPH and hydrogen

• carbon dioxide and water

Tags

NGSS.HS-LS1-7

Which of the following organisms is the most likely to appear first in an area that has not been

previously inhabited?

• Fern

• Small plants

• Lichens

• Seeding plants

What role does bacteria play in the Nitrogen cycle?

• Fixing atmospheric nitrogen into a useable form for plants (nitrates)

• Decomposing dead plants and animals into other Nitrogen compounds

• Transforming the nitrates into atmospheric nitrogen

• All of the above

Tags

NGSS.MS-LS2-3

The by-products of cellular respiration include

• energy and oxygen.

• glucose and oxygen.

• carbon dioxide and water

• glucose and carbon dioxide.

Tags

NGSS.MS-LS2-3

Which event(s) could cause primary succession to occur?

• Floods

• Fires

• Volcanic eruptions

• Both a and c

Tags

NGSS.MS-ESS2-2